Atomic Theory

Front

What is the Plum Pudding Model?

Back

A model of the atom proposed by J.J. Thomson, suggesting that atoms are composed of electrons scattered within a 'soup' of positive charge.

Front

What did Rutherford's model of the atom reveal?

Back

The atom is mostly large empty space with a small, dense nucleus at the center.

Front

Who proposed the first model for the structure of the atom?

Back

J.J. Thomson.

Front

What is the significance of the nucleus in an atom?

Back

The nucleus contains protons and neutrons and is responsible for most of the atom's mass.

Front

What did Rutherford's gold foil experiment demonstrate?

Back

It demonstrated that atoms have a small, dense nucleus and that most of the atom is empty space.

Front

What are protons?

Back

Positively charged particles found in the nucleus of an atom.

Front

What are neutrons?

Back

Neutral particles found in the nucleus of an atom, contributing to its mass.

Front

What are electrons?

Back

Negatively charged particles that orbit the nucleus of an atom.

Front

What is the Modern Atomic Model?

Back

A model that describes the atom as having a nucleus surrounded by a cloud of electrons, where the exact position of electrons cannot be determined.

Front

What is the significance of the electron in atomic theory?

Back

Electrons are responsible for chemical bonding and reactions.